arXiv 0803.21842008-03-14math.AGmath.CO

A tropical interpretation of m-dissimilarity maps

C. Bocci, F. Cools

备注：: 13 pages

英文摘要：

Let T be a weighted tree with n numbered leaves and let D be its distance matrix, so D(i,j) is the distance between the leaves i and j. If m is an integer between 2 and n, we prove a tropical formula to compute the m-dissimilarity map of T (i.e. the weights of the subtrees of T with m leaves), given D. For m equal to 3, we present a tropical description of the set of m-dissimilarity maps of trees. For m equal to 4, a partial result is given.

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